pop-up with no button?

[Shades]

I want labview to have a window pop-up saying "Calculating..." while a subvi is executing.  I suppose then, what I want, is for a pop-up message without buttons to appear, followed by the execution of my subvi, followed by the disappearance of the message.

[tst]

How about something like this?

Another option would be to simply use the Calculating... text as the visible part of your subVI and make the VI open its FP when it's run.

Another option would be to open a dialog VI which will communicate with your VI through some global channel to know when the VI finished.

In any case, you should probably make it modal, so the user can't do anything, but make sure you don't run into a case where you get stuck and have to crash LV.